import pygame
import time
import random
pygame.init()
white=(255,255,255)
yellow=(255,255,102)
black=(0,0,0)
red=(213,50,80)
green=(0,255,0)
blue=(50,153,213)
dis_width=800
dis_height=600
dis=pygame.display.set_mode((dis_width,dis_height))
pygame.display.set_caption('贪吃蛇')
clock=pygame.time.Clock()
snake_block=10
snake_speed=15
font_style=pygame.font.SysFont("bahnschrift",25)
score_font=pygame.font.SysFont("comicsansms",35)
def Your_score(score):
    value=score_font.render("Score:"+str(score),True,yellow)
    dis.blit(value,[0,0])
def our_snake(snake_block,snake_list):
    for x in snake_list:
        pygame.draw.rect(dis,black,[x[0],x[1],snake_block,snake_block])
def message(msg,color):
    mesg=font_style.render(msg,True,color)
    dis.blit(mesg,[dis_width/6,dis_height/3])
def gameLoop():
    game_over=False
    game_close=False
    x1=dis_width/2
    y1=dis_height/2
    x1_change=0
    y1_change=0
    snake_List=[]
    Length_of_snake=1
    foodx=round(random.randrange(0,dis_width-snake_block)/10.0)*10.0
    foody=round(random.randrange(0,dis_width-snake_block)/10.0)*10.0
    while not game_over:
        while game_close==True:
            dis.fill(blue)
            message("Lost! q quit or p agein",red)
            Your_score(Length_of_snake-1)
            pygame.display.update()
            for event in pygame.event.get():
                if event.type==pygame.KEYDOWN:
                    if event.key==pygame.K_q:
                        game_over=True
                        game_close=False
                    if event.key==pygame.K_p:
                        gameLoop()
        for event in pygame.event.get():
            if event.type==pygame.QUIT:
                game_over=True
            if event.type==pygame.KEYDOWN:
                if event.key==pygame.K_LEFT or event.key==pygame.K_a:
                    x1_change=-snake_block
                    y1_change=0
                elif event.key==pygame.K_RIGHT or event.key==pygame.K_d:
                    x1_change=snake_block
                    y1_change=0
                elif event.key==pygame.K_UP or event.key==pygame.K_w:
                    y1_change=-snake_block
                    x1_change=0
                elif event.key==pygame.K_DOWN or event.key==pygame.K_s:
                    y1_change=snake_block
                    x1_change=0
        if x1 >= dis_width or x1 < 0 or y1 >= dis_height or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        dis.fill(blue)
        pygame.draw.rect(dis, green, [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]
        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True
        our_snake(snake_block, snake_List)
        Your_score(Length_of_snake - 1)
        pygame.display.update()
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, dis_width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, dis_height - snake_block) / 10.0) * 10.0
            Length_of_snake += 1
        clock.tick(snake_speed)
    pygame.quit()
    quit()
gameLoop()